Textbook Question
What is the oxidation state of the metal in each of the complexes?
a. [Ni(CN)5]3–
b. Ni(CO)4
c. [Co(en)2(H2O)Br]2+
d. [Cu(H2O)2(C2O4)2]2–
e. Co(NH3)3(NO2)3
24. Transition Metals and Coordination Compounds
Ligands
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
An ion that contains a central metal ion bound to one or more ligands is called a ________.
A
coordination compound
B
chelate
C
complex ion
D
polydentate
E
coloring agent
Verified step by step guidance1
Understand the definition of a complex ion: A complex ion is a species formed from a central metal ion bonded to one or more molecules or ions, known as ligands.
Identify the role of ligands: Ligands are ions or molecules that can donate a pair of electrons to the metal ion to form a coordinate covalent bond.
Recognize the structure of a complex ion: The central metal ion is surrounded by ligands, which can be neutral molecules like water or ammonia, or anions like chloride or cyanide.
Differentiate between similar terms: A coordination compound consists of one or more complex ions, while a chelate is a type of complex ion where the ligand forms multiple bonds with the central metal ion.
Apply the concept to the problem: Given the options, the term that best describes an ion with a central metal ion bound to ligands is a 'complex ion'.
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